Stormwater runoff from a bridge in Effingham, South Carolina.

A study was conducted in South Carolina to quantify the downstream changes in receiving water-quality conditions during periods of observable stormwater runoff from selected bridge decks in South Carolina. The information collected might help to estimate or predict changes in water quality at bridge crossings with similar characteristics. Additionally, comparison of sediment-quality conditions and benthic macroinvertebrate community structure at upstream and downstream locations from selected bridge decks will assess cumulative impact of bridge deck runoff effects on receiving water.